Bead forming device



Aug. 30, 1932. Y. H. KURKJIAN BEAD FORMING DEVICE Filed March 7, 1930 3 Sheets-Sheet 1 @ATTORNEY 1932- Y. H. KURKJIAN 1,875,028

BEAD FORMING DEVICE Filed March 7, 1950 3 Sheets-Sheet 2 MWZLZZ;

iv ATTORNEY Aug. 30, 1932. Y. H. KURKJIAN BEAD FORMING DEVICE Filed March 7, 1950 3 Sheets-Sheet 3 Y E N R O T T A Patented Aug. 30, 1932 PATENT OFFICE YERVANT H. KURKJ'IAN, OF HAWTHORNE, NEW JERSEY, ASSIGNOR T0 CARL -T. SGHMID, INCL, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK Brien FOB-MING DEVICE Application filed March 7, 1930. Serial No. 434,153.

My invention relates to bead forming devices and refers particularly to devices adapted for forming beads upon the open ends of rubber articles such as balloons, finger cots and similar devices.

Rubber articles of the character mentioned 1 are generally produced by depositing a thin film of rubber upon a form, usually of glass, of the general shape of the desired article, forming a head around the open end of the device by rolling the lower edge thereof while the unvulcanized article is upon the form, vulcanizing and then removing the article from the form.

' During the bead forming operation, the rubber is soft, sticky and weak and adheres to the form with considerable tenacity and therefore the greatest care must be exercised during this period of production.

he object of the bead is to strengthen the device and to prevent its being torn during use and hence it is essential that it be absolutely uniform throughout.

If the bead when formed has spots of less thickness than others, or if it has balls, or knots, that is an accumulation of rubber in one spot, it is so weakened that it is practically useless and hence must be discarded.

iiecause of the thinness and sticky nature of the material and because of its liability to be torn, great difiiculty has been experienced in avoiding the production of useless and imperfect devices.

The most satisfactory results are obtained by producing the articles upon revoluble forms and then submitting these revolving forms to the action of aninclined revolving brush adapted to gradually and uniformly roll the edge to form a bead.

It is evident that a proper relationship of revolution between the forms and the brushes must be obtained in order that the head will not be formed too rapidly or too slowly and that this relationship must be maintained without change or interruption.

In the application of this process of bead forming, the revolving brushes are inclined with respect to a table, and the revolving forms are passed across the table in proper abutment with the brushes. There is, therefore, a revoluble and a horizontal movement of the forms against the brushes of therevolving inclined brushes. Hence it is necessary that these three movements be in proper synchronization with each other in order to produce a uniform bead.

Assumln'g the revolution of the brush to be uniform, it is evident'thatif the horizontal movement or the revolution of a form he decreased from normal movement orspeed of d revolution, the brush will actfor a longer period of time upon one spot of the device thus causing an accumulation of rubher at that point, forming a knot and the beadwill not be uniform. Upon the other hand, if" the horizontal movement or the revolution of a form he increased from normal movement or speed of revolution the brush will act for a shorter period of time upon one spot of the device thus causing a deficiency of rubber at that point and producing a uniform bead.

The object of my invention isa device which will overcome the above mentioned and other objectionable features of the present known device, and which will pro duce a uniform bead upon rubber articles of the character described.

In the accompanying drawings illustrating one form of the device of my invention, similar parts are designated by similar numerals.

Figure 1 is a top view of one form of the device of my invention.

Figure 2 is a section on line 2-2 of Figure 1. a

Figure 3 is a section on line 33 of Fig ure 1. I

Figure i isan enlarged fragmentary view of a portion of the rack sections partly bro ken away for clearness of description.

Figure 5 is a section on line 5-5 of Figure 4.

Figure 6 is a section on line 6-6 of Figure 7.

Figure 7 is a section on line 7-7 of Figure 6.

The particular form of the device'of my invention illustrated in the accompanying drawings comprises a table 10 supported by the supports 16, 16. Each supportlfi has a l the table 10: 'By these' means the brush 20 may be raised and lowered to anydesired vertical slot 17, a set-bolt 18 passing through said slot and through andopening in thesup- "thebelts 40 and 47 in taut condition.

The convey-er belts or chains 30, 30, and 30, i .30 are thenrevolvedaround the sprockets 32,

' 33 and'32, 33.

port 116, the latter being fiXe'd'ly attached to position. It, is to be noted that the axis of the brush20 is positioned-angularly tothe top of the table 10. I p

I Th-e 'devi cecontains a 'revoluble brush 20 which issupported and. arranged'as thebrush 20, the several corresponding parts being designated' byi'corresponding "prime numerals. =1 T Positioned upon :thetable '10; are two parallel spacedl rack-carrying members 2l and 21. 'Platese22 and1-22 are positioned "between the rack-carrying members 21 and 21 and theisupports'23'a d 2 I "The rack-carrying members 21 and 21 have a pluralityrof recesses 24, 24 arranged in pairs; Eachxof a plurality of racks 25, 25

carries-a pair ofrods 26, 26 which pass through the recesses 24, 24"and through an opening in the rear wall of a member 21 and are fixed therein by f means of a cotter-pin 127.. A5 coil spring 28 positioned Within eachrecess 24'and abuts upon a rack 25: and

the rear wall of the recess,thus having alnormal tendency to force the rack outwardly.

V The plates 29'and 22' act as guides for the racks. 5 p There-is thus formed a run-way, thetwo sides of which consist of apluralit'y of spring controlled 'horiz'ontally movable :rack sections forming a: continuous rack.

Beneath the racks'25, .25 and. above the table 10 is amovable conveyorbelt compris ingxa plur'alityof links 30, 30, 'everyalternate link having an inwardly extended carrier 31. The chain 'belt passes over jthe'rev oluble sprockets 32 and 33.

' similar conveyer belt' is similarly positioned upon the other side'of the run-way as indicated'with prime numerals. 5

In order to keepthe belts pressedinward-fl lybf 'thetrun-way to co-actwith a platform,

described later, a plurality of links 34, 34 are pivotally attached to the table 10.1: Each linl r' 34 carries a' sprocket 35 capable of co acting with the links of the conveyer chain;

7 A spiral spring? 36 has a tendency to move each sprocket35toward the conveyor chain, thus pressing thejlatterinwar-dly toward the run-way.

' The operation'of the device is as follows;

The drive shaft 37 is revolved thus revolving the sprocket '38-andthe gear39. A chain belt 4Q, meshes with thesprocket 38'and a sprocket14l oarried by the shaft 14 thus =re'- volving the brush 20'. The ear 42 carried by therevolvable shaft 51 meshes with gear 39 and the sprocket 52 is connected by means of the chainbelt 43 with the sprocket 44 car- @Theqform carrying devices comprise a platform 53 upon which are two parallel series of upwardly extended revoluble form carr1ers-54,- 54,' eachhaving an upwardly extended member 54,:each carrying a hired pinion i55 of such size and construction as to bemeshable with the racks 25, .25.. Post tioned'upon each form carrier'54 is ajform 56fpreferablygof glass.

' Experience-has shown that, due tothe treatments to which it isnecessary to subject the formsand the platforms carryingthem,

wood is the most'practical mate-rial :from

which-to form the platforms, and as these are subjected to'heat,'steam and chemical fumes during the process of producing the final cornmodity, "they become somewhat p warped, T contracted and expanded and twlsted slightly away from' their original h p p I I It is evident,therefore, that because of this 7 I change of'shape, there is a liabilitythat the pinions .55, 55 might not mesh properly all. times with afixed rack andhence there would be an interruption of'thenecess ary constant and regularrevolution of the forms, resulting-in the production ofuseless articles.

:I overcome this practical" difiiculty by ploying a plurality-ofresiliently operated raclr-sections125,.25, thus causing the rack sections to be forced into proper meshment with thpinions 55, 55,-even if the platform 53 hasl'been changed in' width or otherwise,

thus compensating'for any di-fi'erencein dis tance that may occur between thepinion an d I rack ifthelatter were stationary: p

; "The'operation of the device is as fellows I The'pl'urality of forms 56, 56' carried by'a" upon theformand the rubber dried- As the lower edge of the article isjirregular in shape,

it is fnecessary to converti-t into one for reg ular shape and at the same time strengthen this-part oft-he article to preventit from 1 tearing during use; This-is accomplished by rolling thelower portion of the rubber into ahead; and as the rubber is thin and pliable and asit adheres to the form with considerable tenacity it is. necessary that this operation be performed with the greatest care.

Experience has shown that this can be accomplished by passing the revoluble forms across the face of a revolving brush, the latter being inclined with respect to the axis of a form to contact with the form from tl e lowest position of the rubber thereon to the height necessary for the production of a proper bead;

The revolutions of the forms and of the brush and the speed of passage of the forms across the brush surface must bear a proper relationship to each other and these move-- ments must be maintained constant during the entire operation to prevent the production of useless articles,

The positive maintenance of these three movements by my device will be evident upon a consideration of the accompanying drawin s. i I

It platform 53 with its rubber covered forms is placed upon the idlers 13, 13 and moved inwardly toward the device until it rests upon the carriers 31, 31 of the belts 30, 30, the links of the belts being forced into contact with the sides of the platform by means of the spring operated sprockets 35, 35, thus compensating for any inequalities of the platform and insuring a constant move ment of the platform. As the platform progresses the pinions 55, 55 mesh with the teeth of the first pair of rack sections, the revolution of the chain carryin the platform forward the pinions meshing with the successive sets of rack sections, the latter because of their resiliently. operative construction compensating for any inequality in the platform.

There is, therefore, a constant revolution of the forms and a constant note of movement of the forms across the face of the inclined brushes 20, 20.

When the lower portion of the brush abuts upon the face of the rubber the lower extremity of the latter is in the position A of F igure 7, and as the platform moves forwardly the brush produces an upwardly formed bead as indicated at B, C and D, this bead forming operation continuing until the rubber has passed beyond the upper end of the brush;

The platform then moves along the idlers 13, 13 and is removed for further operations of vulcanization and treatment.

It will thus be seen that my device presents a means whereby a constant and uniform speed of revolution may be obtained and retained between the forms and the brushes and whereby a constant and uniform speed of movement of the forms across the faces of the inclined brushes maybe obtained and retained.

I do not limit myself to the particular size, shape, number, material or arrangement of parts as shown and described as these are given simply as a means for clearly describing my invention.

What I claim is 1. In a bead forming device, in combination, a revoluble form, a pinion the revolumoving said form causing said pinion to mesh with each rack section during the movement of said form and means capable of revolving said brush.

2. In a bead forming device, in combination, a revoluble form carrier, a form carried by said form carrier, a pinion carried by said form carrier and revoluble therewith, a plurality of separate rack sections forming a continuous rack said rack sections being meshable with said pinion, resilient means forcing each rack section into mesh with said pinion, a revoluble inclined brush capable of abutment upon said form during a movement of said form, means capable of moving said forms causing said pinion to mesh with each rack section during the movement of said forms and means capable of revolving said brush.

3. In a bead forming device, in combination, a movable platform, a plurality of extended revoluble forms carried by said platform, pinions the revolution of which will re volve said forms, a plurality of rack sections meshable with said pinions, resilient means forcing said rack sections into meshment with said pinions, a revoluble inclined brush abutable upon said forms during a movement of said platform, causing said pinions to mesh with said rack sections revolving said pinions and means capable of revolving said brush.

4. In a bead forming device, in combination, a movable platform, a plurality of extended revoluble forms carried by said platform, a run-way within which said platform is movable, a plurality of pinions the revolution of each one of which will revolve a form, a plurality of separate rack sections forming a continuous rack carried by said runway meshable with said pinions when said platform is moved within said run-way, resilient means carried by each said rack-section caus ing each said rack section to mesh with said pinions when said platform is moved within said run-way, means capable of moving said platform, a revoluble inclined brush abutable upon said forms during the passage of said latform through said run-way and means capable of revolving said brush.

5. In a bead forming device, in combination, a revoluble form, a pinion the revolution of whichwill revolve said form, a plurality of separate rack sections forming a continuous rack said rack sections being meshable with said pinion, resilient means forcing each rack section'into meshmen-t with said pinion, a revoluble inclined brush capable of abutment upon said form during movement of said form, means capable of moving said form causing said pinion to mesh with each rack section during the movement of said form, means capable of revolving said brush, means capable of varying the height andvinclination of said brush and means capable of fixing said brush insaid varying positions.

6. In a bead forming device, in combination, a movable platform, a plurality of extended revoluble forms carried by saidplatform, a run-Way within-which said platform is movable, a plurality of pinions the revolution of each one of which will revolve a form, a plurality of separate rack sections forming a continuous rack carried by said run-way meshable with said pinions when said platform is moved within said run-way, resilient meanscarried by each said raclcsection causing each said rack-section to'mesh with said pinions when said platform is moved within said run-way, meanscapable of moving said I platform, a revoluble inclined brush abutable upon said forms during the passage of said platform through said runsway, means capable of revolving said brush, means capable of varying the height and inclination of said brush and means capable of fixing saidbrush in said varying positions.

7; In -a bead forming device, in combina tion,:a movable platform, a plurality of ex tended revoluble forms carried by said plat form, plurality of pinions the revolution of each one of which Wlll revolve a form, a plurallty of separate rack sections meshable w th said pinions, resilient means forcing said rack sections into mesh with said pinions, a plurality of revoluble inclined brushes abutable upon said forms during a movement of said platform, means capable of moving said platform causing said pinions to mesh with said rack sections and means capable of revolving saidbrush. '1

8. In a bead forming device, in combina tion, a revoluble form, a pinion the revolution of which will revolve said form, a plurality of separate rack sections forming a continu ous rack saidlrack sections being mesh'able with said pinion, resilient meansforcing each rack secti on into mesh with said pinion, a plurality of revoluble inclined brushesvcapable of abutment upon'said form during a movement of said forms, means capable of moving said form causing said pinion to mesh with each rack section during the movement of said form and means capable of revolving said brushes. a V

9. In a bead forming device, in combination, a movable platform, a plurality of ex tended revoluble forms carried by saidzplatform, a plurality of pinions the revolution of each oneflof whichwill revolve a form, a plurality ofseparate rack sections meshable with said pinions, resilient means forcing said rack'sections into mesh with said pinions, a plurality of revoluble inclined brushes abutable upon said forms during a movement of said platform, means capable of moving said platform causing said pinionslto'mesh s with said rack sections, means capable of revolving said-brush,.means capable of varying theheight and inclination of said brush and means capable of fixing saidbrush in said varying positions. Y a

10. In a bead forming device, incombination, a revoluble form, a pinion the revolution of which will revolve said form, a plurality of separate rack sections forming a. continuous rack said rack sections belng meshable with said p1n1on,res1l1ent means forcing each rack section into mesh with said pinion, a plu-' rality of revoluble inclined brushes capable of abutment upon said form during a movement of said form, means capable of moving said form causing said pinion to mesh with platform, a plurality of pinions the 'revolution ofeach one of which willrevolve a form,

a plurality of separate rack sections meshable with said pinions, resilient means forcing said rack sections into mesh with said pinions, a plurality of revoluble inclined brushes abut'able upon said'forms during a movement of said platforms, means capable of movlng said platform causingisaid pm ionsto mesh with said rack sections,'means causing constant contactbetween said mov-.

ing means and said platform, means capable of revolving said brushes, means capable of varying the heightand inclination of said brushes and means capable of fixing said brushes in said varying positions.

12. In a beadforming device, in combination, a movable platform, a plurality of extended revoluble forms carried by said platform, a plurality of pinionsthe revolution of each one of which will revolve a form, a plurality of separate rack sections meshable with said pinions, resilient means forcing said rack sections into meshwith said pinions, a plurality of revoluble inclined brushes abutable upon said forms during a movement of said platforms, chain means capable of moving said'platform causing said pinions to mesh-with said -rack sections, means causing'constant contactbetween said a continuous rack said chain means and said platform, means capable of revolving said brushes, means ca pable of varying the height and inclination of said brushes and means capable of fixing said brushes in said varying positions.

13. In a bead forming device, in combination, a revoluble form, a pinion the revolution of which will revolve said form, a plurality of separate rack sections forming rack sections being meshable with said pinion, means forcing each rack section into mesh with said pinion, a revoluble inclined brush capable of abutment upon said form during a movement of said form, means capable of moving said form causing said pinion to mesh with each rack section during the movement or" said form and means capable of revolving said brush.

14. In a bead forming device, in combination, a row of revoluble forms, pinions the revolution of which will revolve said forms, a rack meshable with said pinions, resilient means forcing said rack in a direction at right angles toward the row of pinions into meshment with said pinions, a revoluble inclined brush abutable upon said forms during a movement of said forms, means capable of moving said forms causing said pinions to mesh with said rack revolving said pinions and means capable of revolving said brush.

15. In a bead forming device, in combination, a row of revoluble form carriers, forms carried by said form carriers, pinions carried by said form carriers and revoluble therewith, a rack meshablewith said pinions, resilient means forcing said rack in a direction at right angles toward the row of pinions and maintaining meshment between said pinions and said rack, a revoluble inclined brush abutable upon said forms during their movement, means capable of moving said forms causing said pinions to mesh with said rack revolving said pinions and means ca- 1 pable of revolving said brush.

T and inclination 16. In a bead forming device, in combination, a row of revoluble forms, pinions the revolution of which will revolve said forms, a rack meshable with said pinions, resilient means forcing said rack in a direction at right angles toward the row of pinions into meshment with said pinions, a revoluble inclined brush abutable upon said forms during a movement of said forms, means capable of moving said forms causing said pinions to mesh with said rack revolving said pinions, means capable of revolving said brush, means capable of varying the height of said brush and means capable of fixing said brush in said varying positions.

17. In a bead forming device, in combination, a row of revoluble forms, pinions the revolution of which will revolve said forms,

a movable rack meshable with said pinions, resilient means forcing said rack in a direction at right angles toward the row of pinions, arevoluble brush abutable upon said forms. during their movement, means capable of. moving said forms causing said pinions to mesh with said rack revolving said pinions andmeans capable of revolving said brush.

18. Ina bead forming device, in combination, a row of revoluble forms, pinions the revolution of which will revolve said forms, a movable rack meshable with said pinions, means forcing said rack in a direction at right angles toward the row of pinions into meshment with said pinions, a revoluble inclined brush abutable upon said forms during a movement of said forms, means capable of moving said forms causing said pinions to mesh with said rack revolving said pinions, and means capable of revolving said brush.

19. In a bead forming device, in combination, a plurality of revoluble forms, means capable of yieldingly propelling said forms and means capable of positively rotating said forms during their period of propulsion.

20. In a bead forming device, in combination, a plurality of revoluble forms, means capable of yieldingly propelling said forms, means capable of positively rotating said forms during their period of propulsion and means capable of interrupting said rotation when said propulsion movement is stopped.

21. In a bead forming device, in combination, a plurality of revoluble forms, means capable of yie'ldingly propelling said forms, means capable of positively rotating said forms during their period of propulsion and an inclined revoluble element abutting upon said forms.

22. In a bead forming device, in combination, a plurality of revoluble forms, means capable of yieldingly propelling said forms, means capable of positively rotating said forms during their period of propulsion, means capable of interrupting said rotation when said propulsion movement is stopped and an inclined revoluble element abutting upon said forms.

23. Ina bead forming device, in combination, a row of revoluble forms, pinions the revolution of which will revolve said forms, a rack meshable with said pinions, resilient means forcing said rack in a direction at right angles toward the row of pinions into meshment with said pinions, a revoluble inclined brush abutable upon said forms during a movement of said forms, means capable of yieldingly propelling said forms and means capable of revolving said brush.

24. In a bead forming device, in combination, a row of revoluble form carriers, forms carried by said form carriers, pinions carried by said form carriers and revoluble therewith,- a-rack nieshable with said pinv ionsgresilient means forcing said rack in a direction at right angle'stowafd the row'of pinions and maintaining meshment between said pinions and. said task, a re voluble inoii-ned brnsh' abutable upon said forms .during their movement, yieldable means capable of moving said forms causing saidpinions tomesh with said rackrevolving said pin- L ions and ,means"capab1e of revolving said brnshp ,7 I a 25'. In a bead forming device,.in combination, a row of revoinble forms, pinions, the I revolution of which willrevolve saidforms, 35 a movable rack meshable with said pinions resilient means forcing said rack in a direction at-right angles toward the row of pine ions, a revolnble brush abutabie upon said forms during their movement, yieldabie 120 means capable of moving said forms causing saidv pinions t0 mesh with said rack revolving' said pinions and means capable of revolvingsaid brush; Signed at New York in the county of w New York-and State of New York this 5 day of March, 1930. YERVANT H. KURKJIAN. 

